function trim(value) {
  value = value.replace(/^\s+/,'');
  value = value.replace(/\s+$/,'');
  return value;
}

function systemTogglePanelView(sender, el_id) {
	var el = document.getElementById(el_id);
	if(!el) return;
	if(el.style.visibility == 'hidden') {
		sender.src = sender.src.substring(0, sender.src.indexOf('minimize') == -1 ? sender.src.indexOf('restore') : sender.src.indexOf('minimize'))+'minimize.gif';
		el.style.visibility = "";
		el.style.display = "";
	} else {
		sender.src = sender.src.substring(0, sender.src.indexOf('minimize') == -1 ? sender.src.indexOf('restore') : sender.src.indexOf('minimize'))+'restore.gif';
		el.style.visibility = "hidden";
		el.style.display = "none";
	}
	systemSetCookie(el_id,el.style.visibility,'never');
}

function systemChangePanelView(sender, el_id, visible) {
	var el = document.getElementById(el_id);
	if(!el) return;
	if(visible == 1) {
		sender.src = sender.src.substring(0, sender.src.indexOf('minimize') == -1 ? sender.src.indexOf('restore') : sender.src.indexOf('minimize'))+'minimize.gif';
		el.style.visibility = "";
		el.style.display = "";
	} else {
		sender.src = sender.src.substring(0, sender.src.indexOf('minimize') == -1 ? sender.src.indexOf('restore') : sender.src.indexOf('minimize'))+'restore.gif';
		el.style.visibility = "hidden";
		el.style.display = "none";
	}
	systemSetCookie(el_id,el.style.visibility,'never');
}


var systemIsSetPanelView = new Array();

function systemSetPanelView(sender, el_id, id) {
	var el = document.getElementById(el_id);
	if(!el) return;
	if(systemIsSetPanelView[id]) return;
	systemIsSetPanelView[id] = 1;
	el_visibility = systemGetCookie(el_id);
	if(el_visibility == 'hidden') {
		sender.src = sender.src.substring(0, sender.src.length - 12)+'restore.gif';
		el.style.visibility = "hidden";
		el.style.display = "none";
	}
}

var system_message_timeout;
function systemShowMessage(text) {
	var message = document.getElementById('system_message');
	
	message.innerHTML = text;
	message.style.visibility = 'visible';
//	system_message_timeout = setTimeout('systemHideMessage()', 5000);
}

function systemHideMessage() {
	systemFadeDiv('system_message');
}

function systemFadeDiv(message) {
	var div = document.getElementById(message);
	div.style.opacity = div.style.opacity - .1;
	if (div.style.opacity <= 0.11) {
		div.style.visibility = 'hidden';
		div.style.opacity = 1;
	} else {
		setTimeout("systemFadeDiv('"+message+"')", 100);
	}
}


function systemInitializeBackend() {
	systemRestoreNavigation();
	setTimeout("systemKeepAlive();", 10000);
}

function systemKeepAlive() { 
	x = systemXmlHttp.request("GET", "http://www.hightechcampus.com/keepalive.php", true, null, null, "", null, systemKeepAliveHandler);
//	setInterval("systemKeepAlive();", 300000);
	setTimeout("systemKeepAlive();", 300000);
}
function systemKeepAliveHandler(req) {
	return true;
}